
\begin{table}
\caption{Regression estimates of the association between IGO memberships and CPA implementation at the post-CPA year level. Implementation scores range from 2 to 95. See text for detailed description of estimators.}
\begin{center}
\begin{scriptsize}
\begin{tabular}{l D{.}{.}{5.3} D{.}{.}{3.3} D{.}{.}{3.3} D{.}{.}{3.3}}
\toprule
 & \multicolumn{1}{c}{Within-Between random effects for post-conflict periods} & \multicolumn{1}{c}{Prais-Winsten FGLS with conflict-specific AR(1) autocorrelation and PCSEs} & \multicolumn{1}{c}{Country FE and robust SEs} & \multicolumn{1}{c}{HLIGOs instrumented plus country and year FEs} \\
\midrule
IGOs with high economic leverage (within effect)        & 18.61^{*} &            &            &           \\
                                                        & (3.67)    &            &            &           \\
IGOs with high economic leverage (between effect)       & -1.09     &            &            &           \\
                                                        & (16.11)   &            &            &           \\
IGOs with high economic leverage (composite effect)     &           & 13.03^{*}  & 19.12^{*}  &           \\
                                                        &           & (2.85)     & (4.63)     &           \\
IGOs with high economic leverage (IV, composite effect) &           &            &            & 23.72^{*} \\
                                                        &           &            &            & (11.66)   \\
All other IGOs (within effect)                          & 1.26      &            &            &           \\
                                                        & (6.91)    &            &            &           \\
All other IGOs (between effect)                         & 1.31      &            &            &           \\
                                                        & (14.47)   &            &            &           \\
All other IGOs (composite effect)                       &           & -0.15      & -0.17      &           \\
                                                        &           & (4.22)     & (8.60)     &           \\
All other IGOs (IV, composite effect)                   &           &            &            & -1.64     \\
                                                        &           &            &            & (1.03)    \\
Years since conflict (logged)                           & 12.22^{*} & 14.08^{*}  & 13.54^{*}  &           \\
                                                        & (1.10)    & (0.62)     & (1.71)     &           \\
Transitional power sharing government                   & -3.45     & -6.46      & 21.82^{*}  &           \\
                                                        & (10.26)   & (3.43)     & (7.75)     &           \\
Dispute resolution committee                            & 14.56     & 6.26^{*}   &            &           \\
                                                        & (10.42)   & (3.08)     &            &           \\
Female signatories                                      & 8.26      & 20.48^{*}  &            &           \\
                                                        & (19.07)   & (4.68)     &            &           \\
Conflict duration (logged)                              & -1.29     & -1.55      & -50.30^{*} &           \\
                                                        & (4.63)    & (2.10)     & (3.98)     &           \\
Battle deaths during conflict (logged)                  & 0.17      & 6.06^{*}   &            &           \\
                                                        & (4.31)    & (1.05)     &            &           \\
Territorial conflict                                    & -8.89     & -8.96^{*}  &            &           \\
                                                        & (15.06)   & (2.79)     &            &           \\
Years with mediation  (logged)                          & -0.08     & -11.76^{*} & -60.24^{*} &           \\
                                                        & (12.33)   & (3.03)     & (6.34)     &           \\
New leader since CPA                                    & 0.96      & 1.45       & 1.44       &           \\
                                                        & (1.93)    & (2.08)     & (2.59)     &           \\
Population (logged)                                     & -1.09     & 1.81       & -19.33     &           \\
                                                        & (5.59)    & (1.73)     & (15.01)    &           \\
Economic growth                                         & 0.09      & 0.01       & 0.10       &           \\
                                                        & (0.09)    & (0.09)     & (0.09)     &           \\
Excluded population                                     & 13.08^{*} & -1.70      & 12.18^{*}  &           \\
                                                        & (4.73)    & (5.39)     & (6.04)     &           \\
Natural resources                                       & -14.76    & -13.00^{*} &            &           \\
                                                        & (13.77)   & (2.98)     &            &           \\
Democracy                                               & 2.77      & 1.68       & 2.75       &           \\
                                                        & (2.14)    & (2.24)     & (2.44)     &           \\
GDP per capita before conflict (logged)                 & 3.23      & 1.05       &            &           \\
                                                        & (6.14)    & (2.21)     &            &           \\
Civil war in neighboring country                        & -4.47^{*} & -3.48^{*}  & -4.36^{*}  &           \\
                                                        & (1.41)    & (1.37)     & (1.66)     &           \\
Foreign policy similarity with US                       & -5.79     & 13.34^{*}  & -6.99      &           \\
                                                        & (8.41)    & (6.60)     & (7.62)     &           \\
UN PKO personnel (logged)                               & 0.59^{*}  & 0.53^{*}   & 0.62^{*}   &           \\
                                                        & (0.25)    & (0.18)     & (0.27)     &           \\
Region fixed effects (baseline: East Asia)              &           &            &            &           \\
                                                        &           &            &            &           \\
\quad Europe & Central Asia                             & -11.92    & -8.88      &            &           \\
                                                        & (19.38)   & (7.16)     &            &           \\
\quad Latin America & Caribbean                         & -30.37    & -19.02^{*} &            &           \\
                                                        & (31.03)   & (8.60)     &            &           \\
\quad Middle East & North Africa                        & -32.52    & -13.80     &            &           \\
                                                        & (27.41)   & (12.10)    &            &           \\
\quad South Asia                                        & -21.72    & -42.87^{*} &            &           \\
                                                        & (31.95)   & (9.03)     &            &           \\
\quad Sub-Saharan Africa                                & -22.31    & -20.51^{*} &            &           \\
                                                        & (19.88)   & (5.34)     &            &           \\
Intercept                                               & 71.65     & -2.86      &            &           \\
                                                        & (78.16)   & (27.00)    &            &           \\
\midrule
AIC                                                     & 2256.74   &            &            &           \\
BIC                                                     & 2373.85   &            &            &           \\
Log Likelihood                                          & -1097.37  &            &            &           \\
Num. obs.                                               & 323       & 323        & 323        & 323       \\
Num. groups: pam\_caseid                                & 34        &            &            &           \\
Num. groups: pam\_year\_count                           & 10        &            &            &           \\
Var: pam\_caseid (Intercept)                            & 414.38    &            &            &           \\
Var: pam\_year\_count (Intercept)                       & 0.62      &            &            &           \\
Var: Residual                                           & 55.08     &            &            &           \\
R$^2$                                                   &           & 0.89       & 0.90       & 0.78      \\
Num. groups                                             &           & 34         &            &           \\
Adj. R$^2$                                              &           &            & 0.88       & 0.74      \\
RMSE                                                    &           &            & 7.42       & 10.99     \\
\bottomrule
\multicolumn{5}{l}{\tiny{Standard errors in parentheses. $^* p < 0.05$ (two-tailed test).}}
\end{tabular}
\end{scriptsize}
\label{tab:m_hligo}
\end{center}
\end{table}
